PNG ICO ICNS MORE
Matte: Basic
Message, wrong, Error
Lavender
32x32
LED
Error, warning, exclamation
16x16
Free Web Design
Alert, Error, warning
Error, exclamation, wrong
Farm-Fresh Web
Alert, exclamation, Page
script, exclamation, wrong
Silk
Message, envelope, Letter
Page, warning, exclamation
Error, exclamation, printer
Fugue
warning, Layer, Alert
Bin, warning, Alert
Letter, Email, wrong
WP Woothemes Ultimate
File, document, exclamation
256x256
UI
Pixel
Fugue Icons
Layer, exclamation
mail, exclamation
exclamation, Bin
Notebook, exclamation
PNG MORE
Mixed
Twotiny
Alert, File, exclamation
14x18
Bin, exclamation